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Alpha Persei Cluster: Members, Overview & Description

The Alpha Persei Cluster, also known as Melotte 20 or Collinder 39, is an open cluster of stars in the northern constellation of Perseus. To the naked eye, the cluster consists of several blue-hued spectral type B stars. The most luminous member is the ~2nd magnitude yellow supergiant Mirfak, also known as Alpha Persei. Bright members also include Delta…

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Alpha Persei Cluster topic overview

The analysis highlights Members, Overview and Description as prominent areas in the source structure around Alpha Persei Cluster.

Related topics
31
Source areas
3
Connected nodes
34
Extracted relationships
23
Concept neighborhoods
22
Bridge connections
34

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Overview · 22 topics
Description · 8 topics
Members · 1 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Apparent dimensions (V)
6.1°
Apparent magnitude (V)
1.2[citation needed]
Constellation
Perseus
Declination
+48° 48′ 00″
Distance
570 ly (175 pc)
Estimated age
49.5±6.0 Myr

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

Description

Members

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How Alpha Persei Cluster connects Entity context

The extracted context around Alpha Persei Cluster shows recurring relationship patterns in the source. For example, Alpha Persei Cluster → Alpha Persei Moving Cluster, Archived, Astronomical Photographs, Christine, Frommert, Hartmut, Janne, Kronberg, Käld, March, Mel, Retrieved, SEDS, The Alpha Persei Cluster, The Messier Catalogue Another extracted example is Alpha Persei Cluster → 6.1°. Use these groups to spot repeated connection types before inspecting the individual relationships.

Alpha Persei Cluster

Top relations

related to External links · 15
Alpha Persei Cluster → Alpha Persei Moving Cluster, Archived, Astronomical Photographs, Christine, Frommert, Hartmut, Janne, Kronberg, Käld, March, Mel, Retrieved, SEDS, The Alpha Persei Cluster, The Messier Catalogue
Apparent dimensions (V) · 1
Alpha Persei Cluster → 6.1°
Apparent magnitude (V) · 1
Alpha Persei Cluster → 1.2[citation needed]
Constellation · 1
Alpha Persei Cluster → Perseus
Declination · 1
Alpha Persei Cluster → +48° 48′ 00″
Distance · 1
Alpha Persei Cluster → 570 ly (175 pc)
Estimated age · 1
Alpha Persei Cluster → 49.5±6.0 Myr
Other designations · 1
Alpha Persei Cluster → Per OB3, Cr 39, Mel 20, OCl 392.0
Right ascension · 1
Alpha Persei Cluster → 03h 26m 42.0s

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

cluster also persei alpha stars members 20 distance known 30 perseus pc ly mel constellation age 39 open magnitude 48

Alpha Persei Cluster relationships Subject–Predicate–Object triples

TTTA extracted 23 structured relationships around Alpha Persei Cluster. Examples in this analysis include Alpha Persei Cluster → Apparent dimensions (V) → 6.1° and Alpha Persei Cluster → Apparent magnitude (V) → 1.2[citation needed]. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
Alpha Persei ClusterApparent dimensions (V)6.1°1.00infobox
Alpha Persei ClusterApparent magnitude (V)1.2[citation needed]1.00infobox
Alpha Persei ClusterConstellationPerseus1.00infobox
Alpha Persei ClusterDeclination+48° 48′ 00″1.00infobox
Alpha Persei ClusterDistance570 ly (175 pc)1.00infobox
Alpha Persei ClusterEstimated age49.5±6.0 Myr1.00infobox
Alpha Persei ClusterOther designationsPer OB3, Cr 39, Mel 20, OCl 392.01.00infobox
Alpha Persei ClusterRight ascension03h 26m 42.0s1.00infobox
Alpha Persei Clusterrelated to External linksFrommert0.60section
Alpha Persei Clusterrelated to External linksHartmut0.60section
Alpha Persei Clusterrelated to External linksKronberg0.60section
Alpha Persei Clusterrelated to External linksChristine0.60section

Related concept clusters Concept neighborhoods

The concept neighborhoods around Alpha Persei Cluster bring nearby vocabulary together. In this analysis, examples include Persei, Mel and Also. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Alpha Persei Cluster
    • Persei
    • Mel
    • Also
    • Constellation
    • Magnitude
    • Open
    • Perseus
    • Known
    • Cluster
    • See
    • Supergiant
    • Yellow
  • alpha persei cluster
    • Persei
    • Mel
    • Also
    • Constellation
    • Magnitude
    • Open
    • Perseus
    • Known
    • Members
    • Stars
    • Cluster
    • See
  • open cluster
    • Constellation
    • Perseus
    • See
    • Estimated
    • Magnitude
    • Pc
    • Persei
    • Age
    • Distance
    • Ly
    • Mel
    • Stars
  • alpha persei
    • Persei
    • Mel
    • Also
    • Constellation
    • Magnitude
    • Open
    • Perseus
    • Known
    • Members
    • Cluster
    • See
    • Supergiant
  • 48 persei
    • Mel
    • Constellation
    • Magnitude
    • Perseus
    • Members
    • Delta
    • Psi
    • See
    • Sigma
    • Supergiant
    • Yellow
    • Estimated
  • members
    • Ly
    • Persei
    • Psi
    • See
    • Sigma
    • Estimated
    • Open
    • Pc
    • Perseus
    • Tidal
    • Age
    • Distance
  • constellation
    • Open
    • Perseus
    • See
    • Estimated
    • Magnitude
    • Pc
    • Persei
    • Age
    • Distance
    • Known
    • Ly
    • Mel
  • cosmic distance ladder
    • Pc
    • Hipparcos
    • Light-years
    • See
    • Estimated
    • Magnitude
    • Open
    • Perseus
    • Age
    • Ly
    • Mel
    • Members

Connections between topic areas Semantic bridges

For Alpha Persei Cluster, one of the stronger structural bridges in this analysis connects Alpha Persei Cluster with Overview. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
Alpha Persei Cluster — Overview · splits 12 ⟂ 23
Alpha Persei Cluster — Description · splits 26 ⟂ 9

Map overview Semantic statistics

Alpha Persei Cluster

Nodes35
Edges34
Triples23
Avg. degree1.94
Density0.057143
Components1

Source & methodology

TTTA analyzes the structure around Alpha Persei Cluster to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Members, Overview & Description, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Alpha Persei Cluster · EN edition · Analysis: TopicsToTalkAbout

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